Liebert EFC Indirect Evaporative Freecooling System, 400kW

The Liebert EFC Indirect Evaporative Freecooling System is a highly reliable and efficient cooling system for colocation, cloud hosting and other large data centers. It combines a highly efficient heat exchanger and advanced Liebert iCOM controls to help customers save money, reduce risks and simplify thermal management. The Liebert EFC achieves mechanical PUE levels as low as 1.03, provides a single footprint for rapid deployment and is a highly scalable solution.


  • High efficiency heat exchanger providing up to 1 degree F approach to wet bulb temperature
  • Low peak power
  • Dry-mode effectiveness of 85%
  • Heat exchanger air leakage of just 0.1% - one-tenth that of heat wheels
  • Integrated controls with advanced communications and algorithms for self-healing protective routines and multi-unit teamwork efficiency
  • Quick restart options in event of a power outage
  • Low maintenance design and operation
  • Single footprint
  • Optional DX trim for additional capacity


Saves You Money
  • World’s most energy efficient heat exchanger, with an operational PUE as low as 1.03
  • Maximum annual hours of dry and wet economization per year, while minimizing annual water usage
  • Low peak power to allow downsizing of backup generator capacity or make more IT power available for sale
  • Increased productivity through advanced controls and monitoring
  • Lowest operating costs for higher profitabilityLowers Your Risks
  • Multiple EC fans and DX circuits to ride through individual component failure
  • Recover unit cooling capacity quickly during power events
  • Rapidly scalable for faster deployment and time to market
  • Ensures complete separation of air streams preventing any contamination and humidity infiltration Makes Management Easier
  • Advanced controls that leverage unit and system monitoring intelligence
  • Built-in routines for optimizing operations based on the cost of water and cost of energy for the most cost-effective performance.
  • Controls algorithms automatically manage unit lead/lag, protect against coil freeze, manage compressor utilization, maximize economization and perform other business-critical functions
  • Reduced maintenance burden through automated economization and having fewer moving parts than other technologies such as heat wheels 

Additional Models